The Winchester Model 97 Trench Gun WWI is a usa-made pump-action shotgun chambered in 12 gauge, introduced in 1897. Primary use: hunting, home_defense. Type: Shotgun Action: Pump-Action Caliber: 12 gauge Capacity: 5 Year introduced: 1897, USA Weight: 100 oz Overall length: 47.5" Status: Discontinued Military use: Yes Intended use: hunting, home_defense